What are the chiller plant maintenance procedures
The chiller plant maintenance procedures are as follows:
- Treat condenser water to prevent scale, corrosion.
- Lower entering water temperature.
- Keep chilled water flow rate between 3 to 12-ft per second.
- Analyze compressor oil.
How often should chiller tubes be cleaned
Having a regular cleaning method for a chiller is very important, because this can make a chiller’s life longer. It is highly recommended that cleaning condenser tubes should be cleaned annually, because they typically are part of an open system. And it is recommended that cleaning evaporator tubes should be cleaned once every three years for closed systems.
What is chiller efficiency
As we all know, chiller is a very high-efficiency cooling equipment. So some people may wonder what is chiller efficiency. The Coefficient of performance is a ratio of the refrigeration effect produced by the chiller against the amount of electrical energy that went into the machine to produce this.
How can calculate chiller efficiency
1.Calculating chiller efficiency includes three approaches, they areBy the capacity in tons of refrigeration.
2.By the formula EER = Btu/hr cooling/watts consumed.
3.By dividing the 846,000 Btu/hr by the 69.06 kW-hr consumed to yield an EER of 12.25, and a COP of 3.59.
What is chiller plant approach
In the refrigeration industry, it is divided into two types: air-cooled chillers and water-cooled chillers. According to the compressor, it is divided into screw chillers, scroll chillers, and centrifugal chillers.Its working principle is a multifunctional machine that removes liquid vapor through compression or heat absorption refrigeration cycle.
What causes a chiller to trip
If the voltage of the three-phase power supply is insufficient, or the output is unbalanced, the relay will disconnect the voltage or start the protective action, which will cause the refrigerator to stop. Such problems are generally caused by power supply equipment failure or heavy line load.If the working current allowed by the switch is less than the starting current, it will definitely start to trip; if the short delay current parameter is set too low, the freezer will trip when it is affected by the inrush current when it changes from low speed to high speed.